Specific Heat
Purpose:
The purpose of this laboratory experimentation is to calculate "c" and the specific heat of the metal slugs.
Materials:
Apparatus:
(1) stirring rod
(1) wooden top
(1) tin cup
(5) Slugs: tin, aluminum, copper, lead, and an unknown.
(1) calorimeter
(1) balance
(1) thermometer
Procedures:
1. Construct a table or a chart in which data could be properly labeled and read before conducting any measurements.
2. Wash the tin cup, which is found in the calorimeter.
3. Dry the cup and locate the rod. Using a balance, measure the weight in grams of the tin cup and the rod.
4. Fill the tin cup with water and weigh the tin cup with the water.
5. Find the weight of the water by subtracting the weight of the tin cup. Denote the results in the proper location in a chart or table constructed.
6. Place tin cup, filled with water, onto the calorimeter and seal the tope with a wooden top. Two holes should be on the top, one for the stirring rod and the other for the thermometer.
7. Measure the initial temperature of the water and record the result in the proper location in a chart or table constructed.
8. The instructor should have the slugs in a hot medium ready for experimentation. Assign a member in your team to obtain a slug from the instructor.
9. The instructor should carefully set the slug in your tin cup.
10. Carefully place the tin cup in the calorimeter and seal it with the wooden top.
11. Stir the water with the rod and measure the initial temperature. Denote the results.
12. After the final temperature has been taken, carefully take out the slug from the tin cup and dry it with a towel or paper.
13. Weigh the experimented slug. Denote the result.
14. Continue steps 8 -- 13 including the unknown.
15. Once the data is carefully calculated, place all laboratory materials in their corresponding locations.
Data and Calculations:
Mass (grams):
mcup = 50 grams mrod = 11 grams
mh20 = 200 grams CAl = 903
Ch20 = 4180
Heat Loss = Heat Gain
mslug Cslug (Tinitial-slug -- Tfinal) = (mcup CAl + mrod CAl + mh20 Ch20) (Tfinal -- Tinitial-h20)
Cslug = (mcup CAl + mrod CAl + mh20 Ch20) (Tfinal -- Tinitial-h20) / (Tinitial-slug -- Tfinal) mslug
Tin
mtin = 65 g
Tinitial-slug = 170 C
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